Dow Sealants for Sustainable Infrastructure

Durability is a key requirement for modern infrastructure projects – highways and roads, bridges, airports and airfields, walkways and plazas, parking structures and stadiums. Miles of concrete must be designed to accommodate significant movement – especially in the joints – caused by unrelenting weather, temperature extremes, UV radiation and chemicals, such as de-icing materials and fuels.

Dow offers a broad portfolio of technologies and expertise to support infrastructure projects. The company is developing innovative products, while following sustainable practices, and using proven, durable materials. Dow sealants, for example, provide excellent durability, long-term adhesion, elastic recovery and elongation – without cracking over time. These silicones offer exceptional performance under long-term UV exposure and high temperatures.

DOWSIL™ Sealant Technologies
There are many different technologies used in infrastructure sealing applications – especially for joints exposed to high temperatures and UV, where long-term durability is necessary. Some of the demanding requirements for sealants in highways, airports and other infrastructure applications include:
  • Watertight and long-lasting joints
  • Accommodating extreme movements
  • No cracking
  • Excellent weatherability
  • Fast and easy installation
  • Long service life.
Unlike other technologies, DOWSIL™ Silicone joint sealants don’t crack, crumble, dry out or become brittle. They remain flexible and resilient years after installation, supporting long-lasting and watertight joints. Whether it is for new joints or refurbishment of existing joints, DOWSIL™ Silicone pavement sealants give proven performance in concrete-to-concrete, concrete-to-asphalt, concrete-to-steel and steel-to-steel expansion joints in horizontal and vertical applications.

DOWSIL™ pavement joint sealants are cold applied without the need for heating or other special preparation. Suitable for application over a wide temperature range, they cure using moisture in the air, and the skin-over time is one hour or less – allowing roadways to be opened to traffic quickly.

Dow silicone sealants are flexible; this is because every DOWSIL™ pavement silicone joint sealant has a movement capability of 100% expansion and 50% compression, once cured. The silicones resist hardening in cold temperatures and softening in warm weather, and due to their weatherability they are unaffected by rain, snow, sunlight, ozone or temperature extremes.

Dow Sealants for Sustainable Infrastructure

Features of DOWSIL™ 888 Silicone Joint Sealant
DOWSIL™ 888 Silicone Joint Sealant can be used with a primer for concrete-to-steel and steel-to-steel joints, and can seal joints that are not uniform in width or have minor spalling. It is weather and UV resistant, as well as fuel resistant for short-term exposure. It can accommodate extreme movement – 100% extension and 50% compression

This low-modulus sealant is ready to use as supplied and is dispensed directly from the bulk container into the joint – by hand or with an air-powered pump. It can be extruded from -30 to 50°C. Recommended maximum joint width for typical applications as airport runway or taxiways is two inches (5.08 cm).

However, it should not be used with asphalt as the product’s modulus might be high enough to induce additional stress, which could lead to asphalt substrate spall when subject to joint movement.

Dow Sealants for Sustainable Infrastructure

Features of DOWSIL™ 890-SL Silicone Joint Sealant
This self-levelling, one-part sealant can be used for concrete-to-concrete and concrete-to-asphalt pavement joints without a primer. With a primer, it also can be used for concrete-to-steel and steel-to-steel joints. It will flow into irregularly shaped and spalled joints with no tooling required.

This ultra-low-modulus sealant is ready to use as supplied. An ultra-low modulus is important for asphaltic paving to help ensure minimal stress is placed on the joint face. It can be extruded from -30 to 50°C. The cured silicone rubber remains flexible from -30 to 150°C. It can accommodate extreme movement – 100% extension and 50% compression. It is weather and UV resistant, as well as fuel resistant for short-term exposure. Recommended maximum joint width for typical applications is two inches (5.08 cm).

Features of DOWSIL™ 902 RCS Joint Sealant
This rapid-cure, self-levelling, two-part sealant can be used for concrete-to-concrete, concrete-to-asphalt, concrete-to-steel, and steel-to-steel expansion joints. The typical applications are bridge or highway expansion joints that vary in width from 25 to 76 mm.

This sealant’s rapid cure makes it especially well-suited for maintenance work where resealing must be completed within a short period of time to minimize traffic disruption. Its rapid cure develops sufficient integrity within eight hours to accommodate movements associated with bridges. With all-temperature gunnability, this ultra-low modulus, self-levelling sealant will seal irregularly shaped and spalled joints with no tooling required. Under normal conditions, this sealant remains rubbery from -45 to 150°C without cracking, tearing, or becoming brittle.

The two-part formulation offers the ease of a one-part installation – with no premixing or measuring required. The product is available in convenient EZ Pak sausages, making it easy to load, use, dispose and minimize material waste. The two EZ Pak sausages (592 mL each) are easily dispensed in a 1:1 ratio with a dual-sausage pneumatic gun. The sealant components are also available in larger bulk pails.
JOGANI Reinforcement: Offering High Performance Engineering Fabric Products & Solutions
Jogani Impex is considered an industry leader in providing international grade Alkali Resistant ARACC Coated waterproofing mesh, which enhances the waterproofing systems and solutions in all types of buildings and structures, while saving money

Read more ...

Waterproofing Basements - Importance & Challenges
Assess Build Chem, a leading provider of construction chemicals, is ensuring long-term protection of buildings with its innovative waterproofing solutions that include a 5-step waterproofing method for deep and large basements. Sunny Surlaker, Head

Read more ...

Agrani: Setting Benchmarks for Quality & Reliability
By adhering to the highest industry standards, Agrani Group has gained a reputation for delivering solutions that surpass client expectations, avers Ramendra Bahadur Sinha, Managing Director. In the dynamic field of specialized construction that includes

Read more ...

FAIRMATE Introduces FAIRFLO CRYSTALLINE – a Crystalline Capillary Waterproofing Admixture for Concrete
FAIRMATE is catering to the Speciality Construction Chemical Industry by manufacturing a complete range of construction chemicals, along with cost-effective solutions and world-class services. The company has a long-standing expertise in the field

Read more ...

Nippon Paint expands into Rs. 12,500 cr Construction Chemicals market
In line with its global vision, Nippon Paint India is expanding its portfolio beyond the paint and coatings product range; it will now offer products and solutions under the broad categories: Dry mix, Repair and Maintenance, Construction Chemicals, and

Read more ...

Alkali-Aggregate Reaction in Concrete Structures and Preventive Measures
When the alkali of cement reacts with the reactive constituents of aggregates, the reaction is deleterious though very slow, and the distress is exhibited when the volume inside the concrete is increased due to the formation of alkali-silica gel, causing the

Read more ...

Optimizing Existing Structures Through Retrofitting
Despite understanding the potential of retrofitting and its distinct and far-reaching advantages in making existing buildings green and sustainable, retrofitting continues to be undertaken on a very limited scale; hence, it needs to be promoted and made mandatory

Read more ...

Cause of Distress of an Old Building Through Analytical and Micro-Analytical Methods
The technical service life of a reinforced concrete building is the time in service when structural safety is unacceptable due to either material degradation or exceeding the load carrying capacity, or both. In which case, the repair strategy may be adopted

Read more ...

Value Engineering with MCI®-2019 for Concrete Maintenance and Repair
True value engineering saves money without reducing service life or affecting the quality of construction or materials. Ideally, it adds value to the project. MCI®-2019 is one such value engineering solution that can extend the service life of existing

Read more ...

Agrani Milestone Use Carbon Fiber Laminates to Strengthen Slab
Ramendra Bahadur Sinha, Managing Director, Agrani Milestone, explains the remedial measures and challenges faced during slab strengthening of a deflected slab at IIT. NBCC India Limited undertook the strengthening of a deflected slab at a G+2 storey IIT building

Read more ...

Waterproofing Challenges & Remedial Measures in High Rise Buildings
High-rise buildings need special attention when it comes to waterproofing as the challenges inherent in them are peculiar in nature. Unfortunately, there is a lack of knowledge on the remedies and products available in the market as water- proofers continue to

Read more ...

Importance of Waterproofing Structures
The longevity of structures depends on how much resistance the building element will offer to water ingress. Water leakage not only reduces the durability but also hampers the serviceability or usability of the structure; hence, a good waterproofing system will

Read more ...

Terrace Waterproofing Solutions for Energy-Efficient Buildings
Terrace waterproofing is particularly important and is considered a priority as the roof is always exposed to harsh climatic conditions and weather changes. Rajeev Gupta, Business Head, ECMAS Construction Chemicals Pvt. Ltd. An effective waterproofing solution

Read more ...

Structural Rehabilitation of Reinforced Concrete Structures
Cement concrete is one of the most important construction materials and is practically basic to present-day developments. It is strong enough mechanically, yet vulnerable to deterioration. It thus gets damaged and even fails. This deterioration may be due to the weathering

Read more ...

Thermax - HDPE-SBS Waterproofing System for Basement Waterproofing
Gradual shift in lifestyle has driven the idea of modern construction towards developing underground spaces and buried structures to bring efficiency in use of space. However, the improved efficiency comes with an increase in challenges like infiltration

Read more ...

Waterproofing in Hilly Areas with Sub-Zero Temperatures
Industry experts Kunjan Popat, General Secretary, Waterproofing Association of India; Ramendra Bahadur Sinha, Managing Director, Agrani Enterprises, and MS Sudish, Director, SIWIN Institute of Waterproofing and Insulation, share the challenges

Read more ...

FAIRMATE FAIRCURE WC - White Pigmented Concrete Curing Aid
Buildings have major environmental impacts over their entire life cycle. Resources such as ground cover, forests, water, and energy are depleted to give way to buildings. Today, India has demonstrated

Read more ...

Repair and Rehabilitation of A Minor Bridge in Shravasti District  (UP), India
Scour is a natural phenomenon caused by the erosive action of flowing stream on alluvial beds. Failure of bridge due to scour at their foundations, which in this case consisted of abutments and pier, one 1.2 dia

Read more ...

Faircoat Anti-Carbonation Coating Protects Concrete Structures Like Flyovers, Bridges & Buildings
To protect concrete structures like Flyovers, Bridges, Parking areas, Big Commercial and Residential Buildings, the normal decorative exterior paint will not serve the purpose as these paints are not vapour permeable

Read more ...